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Hydroxyapatite and ß-TCP modified PMMA-TiO2 and PMMA-ZrO2 coatings for bioactive corrosion protection of Ti6Al4V implants.
Harb, Samarah V; Bassous, Nicole J; de Souza, Thiago A C; Trentin, Andressa; Pulcinelli, Sandra H; Santilli, Celso V; Webster, Thomas J; Lobo, Anderson O; Hammer, Peter.
Afiliação
  • Harb SV; São Paulo State University (UNESP), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil.
  • Bassous NJ; Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA.
  • de Souza TAC; São Paulo State University (UNESP), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil.
  • Trentin A; São Paulo State University (UNESP), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil.
  • Pulcinelli SH; São Paulo State University (UNESP), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil.
  • Santilli CV; São Paulo State University (UNESP), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil.
  • Webster TJ; Department of Chemical Engineering, Northeastern University, Boston, MA 02115, USA.
  • Lobo AO; Federal University of Piauí (UFPI), Interdisciplinary Laboratory for Advanced Materials (LIMAV), Department of Materials Engineering, 64049-550 Teresina, PI, Brazil.
  • Hammer P; São Paulo State University (UNESP), Institute of Chemistry, 14800-060 Araraquara, SP, Brazil. Electronic address: peter.hammer@unesp.br.
Mater Sci Eng C Mater Biol Appl ; 116: 111149, 2020 Nov.
Article em En | MEDLINE | ID: mdl-32806280
Organic-inorganic hybrid coatings deposited on different types of metallic alloys have shown outstanding anticorrosive performance. The incorporation of osteoconductive additives such as hydroxyapatite (HA) and ß-tricalcium phosphate (ß-TCP) into organic-inorganic hybrid coatings is promising to improve the osseointegration and corrosion resistance of Ti6Al4V alloys, which are the most widely used metallic orthopedic and dental implant materials today. Therefore, this study evaluated the capability of poly(methyl methacrylate) (PMMA)-TiO2 and PMMA-ZrO2 hybrid coatings modified with HA and ß-TCP to act as bioactive and corrosion protection coatings for Ti6Al4V alloys. In terms of cell growth and mineralization, osteoblast viability, Ca+2 deposition and alkaline phosphatase assays revealed a significant improvement for the HA and ß-TCP modified coatings, compared to the bare alloy. This can be explained by an increase in nanoscale roughness and associated higher surface free energy, which lead to enhanced protein adsorption to promote osteoblast attachment and functions on the coatings. The effect of HA and ß-TCP additives on the anticorrosive efficiency was studied by electrochemical impedance spectroscopy (EIS) in a simulated body fluid (SBF) solution. The coatings presented a low-frequency impedance modulus of up to 430 GΩ cm2, 5 decades higher than the bare Ti6Al4V alloy. These findings provide clear evidence of the beneficial role of HA and ß-TCP modified hybrid coatings, improving both the biocompatibility and corrosion resistance of the Ti6Al4V alloy.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Durapatita / Polimetil Metacrilato / Materiais Revestidos Biocompatíveis Idioma: En Revista: Mater Sci Eng C Mater Biol Appl Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Durapatita / Polimetil Metacrilato / Materiais Revestidos Biocompatíveis Idioma: En Revista: Mater Sci Eng C Mater Biol Appl Ano de publicação: 2020 Tipo de documento: Article País de afiliação: Brasil País de publicação: Holanda